7 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
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YOUR RESEARCHOil Evacuator
Reported or suspected cause
these engines it is tough
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Reported cause
The problem is with these engines it is tough to get a tube down to the bottom of the oil sump.
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Suggestion · Original poster
I'm thinking once a year do a proper oil change but after DE's do a quick change by evacuator may be a good thing- until I heard about the perils noted above.
Leading evidence: 'these engines it is tough' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'these engines it is tough' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Replace but' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion · Original poster
I'm thinking once a year do a proper oil change but after DE's do a quick change by evacuator may be a good thing- until I heard about the perils noted above.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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Suggestion · Original poster
I've been hearing more about oil evacuators for oil changes, some friends use them and I'm told many of the dealers use them- Porsche and MB.
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Suggestion
Really it should be as much as would drain out or the oil change will leave too much old oil in the engine.
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Suggestion
They are designed to use these machines - you don't actually have to run a tube to the bottom of the pan rather a plug goes in the top of the dipstick and it sucks it straight out.
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Replace but
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Suggestion · Original poster
I'm thinking once a year do a proper oil change but after DE's do a quick change by evacuator may be a good thing- until I heard about the perils noted above.
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
They are designed to use these machines - you don't actually have to run a tube to the bottom of the pan rather a plug goes in the top of the dipstick and it sucks it straight out.
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
They are designed to use these machines - you don't actually have to run a tube to the bottom of the pan rather a plug goes in the top of the dipstick and it sucks it straight out.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
7 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Generation: 20261026T191851Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I've been hearing more about oil evacuators for oil changes, some friends use them and I'm told many of the dealers use them- Porsche and MB. Seems easier but do they work as well? I was wondering if anyone had ever removed the oil with an evacuator then jacked the car up and removed the drain plug to measure the amount remaining and compare the stuff in the evacuator to any that drains out the plug? I was thinking about trying an evacuator, and thinking about the pneumatic one- connects to your air compressor instead of manual pump- anyone with any experience with these?
Not aware that Porsche sanctions the use of an oil extractor system to remove oil from any of its vehicles. New models might be "designed" to accept an oil extractor system hose/tube at some point but older models? No.
Haven't kept up on M-B tech. I hear from the local Porsche dealer -- which is owned by a family that owns the Audi dealer down the street -- that new Audis will at some point be drained with an oil extractor system. The engien will not have a drain plug but the bottom of the engine sump will have a depression that will be where the oil tube will end up to ensure the proper amount of oil is removed each time.
The problem is with these engines it is tough to get a tube down to the bottom of the oil sump. I remember when I had my Boxster's oil analyzed the tech at the shop was unable to get the tube -- and he had by this time switched to a small diameter nylon tube -- down far enough through the oil filler tube to get any oil. And all he required was just ounces.
Finally he tried the tube in oil dipstick hole and managed to "strike" oil and got the few ounces he was after.
Even if this small tube could get all the way down down there is the risk one could damage the oil sump baffles. Tear one or knock one loose.
Or the pick up tube plugs up with some trash that is on to of the sump plate (the trash has probably been there since the day the engine was first started) and because of this or just because of the sump is not designed to have oil sucked out not all the oil gets removed.
Then the question becomes how much oil got removed? Really it should be as much as would drain out or the oil change will leave too much old oil in the engine. (Some already believe the amount that is left is real bad and seek ways to get the last drop of old oil out.)
My advice is to stick with the tried and true procedure: Bring the engine up to temperature, drain the oil 20 minutes ( longer with the newer DFI engines), replace the drain plug seal ring, the filter housing o-ring, the filter element, then add in the correct amount of oil and confirm the in-dash oil level reading is correct.
I have one at my shop made by Mityvac, but it does not work well on Porsches because of the design of the dipstick tube. It works great on most Mercedes and Audis, among others. They are designed to use these machines - you don't actually have to run a tube to the bottom of the pan rather a plug goes in the top of the dipstick and it sucks it straight out.
It's definitely not the standard, and I know of folks with older BMW's who use it all the time, but of course it won't work on new BMW's because there is no dipstick. The MB dealer said they use it but it is dependent on the discretion of the tech. Someone that works at the local Porsche dealer says they use it but I will have to ask if it is only on late model cars. Very interesting that Audi may actually design the engine to accommodate this. I'm thinking once a year do a proper oil change but after DE's do a quick change by evacuator may be a good thing- until I heard about the perils noted above. And I'm still thinking it may be a good thing if you have lots of little engines- generators, lawn mowers, lawn tractors, boat motors.
